RK7300-CART-3P Pressure Balance Cartridge for Zurn Z-7300

RK7300-CART-3P Shower Pressure Balance Valve Cartridge – Compatible with Zurn Z-7300, Z-7301 & Z-7302

Restore consistent water temperature and steady flow to your shower or tub with this precision-engineered RK7300-CART-3P Pressure Balance Valve Cartridge. Designed as a direct replacement for Zurn Z-7300, Z-7301, and Z-7302 handle faucets and tub/shower valves, this cartridge delivers a seamless drop-in fit — no special tools or complicated plumbing required. Anti-leak PTFE tape is included for a secure, drip-free installation right out of the box.

Key Features

• Premium Materials: Constructed from a copper alloy (brass) body combined with ceramic discs, durable rubber seals, and ABS components — engineered for longevity, waterproof performance, and resistance to warping or deformation.
• Precise Compatibility: Direct replacement cartridge for model RK7300-CART-3P; compatible with Zurn Z-7300, Z-7301, and Z-7302 single-handle faucets, tub valves, and shower valves.
• Pressure Balancing Technology: Maintains a consistent water temperature during use by automatically balancing hot and cold water pressure — ideal for safer, more comfortable showers.
• 40mm Diameter Valve Core: Precision-sized at 40mm in diameter to ensure a snug, leak-free fit within compatible Zurn valve bodies.
• Easy DIY Installation: Simply remove the old cartridge and insert the new one — no specialized plumbing expertise needed. The included PTFE (raw) tape helps seal connections and prevent leaks from the start.
• Long Service Life: High-quality construction ensures reliable performance over time, reducing the need for frequent replacements.

Specifications

• Model: RK7300-CART-3P
• Compatible Valves: Zurn Z-7300, Z-7301, Z-7302
• Valve Core Diameter: 40mm
• Material: Copper Alloy (Brass), Ceramic, Rubber, ABS
• Type: Pressure Balancing Cartridge
• Country of Origin: Made in China

What's in the Box

• 1 × RK7300-CART-3P Shower Pressure Balance Valve Cartridge
• 1 × PTFE Anti-Leak Tape

Related Products You May Need

Looking to upgrade or fix other fixtures in your bathroom? Check out these related items:

• 1-1/4" Adjustable Washbasin Siphon Trap | Leak-Proof Silicone
• 1-Inch Threaded Brass Ball Valve – Water, Gas & Oil Flow Control

Helpful Resource

For guidance on plumbing safety standards and best practices for home plumbing fixtures, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: Sterling Plumbing

Frequently Asked Questions

Q: What faucet models is the RK7300-CART-3P pressure balance cartridge compatible with?

A: This cartridge is a direct replacement designed for Zurn Z-7300, Z-7301, and Z-7302 single-handle faucets, tub valves, and shower valves. Always verify your existing valve model number before purchasing to ensure compatibility.

Q: Is installation of the RK7300-CART-3P cartridge a DIY-friendly task?

A: Yes! The cartridge is designed for straightforward replacement — simply shut off the water supply, remove the old cartridge from your Zurn valve body, and insert the new one. The included PTFE anti-leak tape helps seal the connection. Basic plumbing knowledge is sufficient; no special tools are required.

Q: What does a pressure balance valve cartridge do?

A: A pressure balance valve cartridge automatically adjusts and balances the ratio of hot and cold water pressure within your shower or tub valve. This keeps your water temperature consistent even when other fixtures in your home are in use (such as flushing a toilet), ensuring a comfortable and steady shower experience.

Q: What is the diameter of the RK7300-CART-3P valve core?

A: The pressure balance valve core measures 40mm in diameter, engineered to fit precisely within compatible Zurn Z-7300 series valve bodies for a secure, leak-free seal.